Physics Problems

1082 Words Jan 25th, 2012 5 Pages
UNIFORMLY ACCELERATED MOTION Problem-Solving

1. A car traveling at 22.4 m/s skids to a stop in 2.55 s. Determine the skidding distance of the car (assume uniform acceleration). 2. A bike accelerates uniformly from rest to a speed of 7.10 m/s over a distance of 35.4 m. Determine the acceleration of the bike. 3. An engineer is designing the runway for an airport. Of the planes which will use the airport, the lowest acceleration rate is likely to be 3 m/s2. The takeoff speed for this plane will be 65 m/s. Assuming this minimum acceleration, what is the minimum allowed length for the runway? 4. If basketball player has a vertical leap of 1.29 m, then what is his takeoff speed and his hang time (total time to move
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Hammy has jumped with initial velocity of 5 m/s at an angle of 250 for 1 second. Will he be able to reach the ice block? If not maintaining the same velocity and hang time, what should be the angle of his take off to be able to reach the ice block?

2. The target is located 100 m away from the cannon. The target is aimed at 250 angle. The target was hit after 2s. What is the velocity of the cannon ball upon being fired? At what distance from the ground is the peak of the projectile?

3. A bullet is fired with a velocity of 200 m/s at an angle of 450 from the horizontal, after approximately 2s, the target is hit. How far is the target placed?

B. Target is higher than Launch point

1. The horizontal distance of the cannon from the target is 100 m away. However the target is on top of a hill with a height of 15 m. The cannon is aimed at 500 angle from the horizontal and upon firing cannon ball has a velocity of 150 m/s. Will the target be hit by the cannon? 2. Your opponent is located at a horizontal distance of 5m. But he is elevated at a height of 3m. Your cannon always fire the cannon ball at a velocity of 120m/s, the hang time of the cannon ball is 1.5 s. What should be your aim angle to be able to hit your opponent? With that aim angle, how high is the peak of the projectile? 3. You are located uphill at a height of 6m from the ground. Your opponent is at a horizontal distance of 260 m away from…

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